13655559 has 4 divisors (see below), whose sum is σ = 18207416. Its totient is φ = 9103704.

The previous prime is 13655533. The next prime is 13655561. The reversal of 13655559 is 95555631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95555631 = 3 ⋅31851877.

It is not a de Polignac number, because 13655559 - 2⁵ = 13655527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13655519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2275924 + ... + 2275929.

It is an arithmetic number, because the mean of its divisors is an integer number (4551854).

Almost surely, 2^13655559 is an apocalyptic number.

13655559 is a deficient number, since it is larger than the sum of its proper divisors (4551857).

13655559 is an equidigital number, since it uses as much as digits as its factorization.

13655559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4551856.

The product of its digits is 101250, while the sum is 39.

The square root of 13655559 is about 3695.3428798963. The cubic root of 13655559 is about 239.0212395706.

The spelling of 13655559 in words is "thirteen million, six hundred fifty-five thousand, five hundred fifty-nine".